What's been working for me has been a single coil in my Magma. It's 9 (or 10, I forget) wraps of 26 gauge wire around a 3/32 drill bit, giving me 1.3 ohms. For my fruit flavors, I tend to vape it at 24 watts. It gives me the best flavor, IMO. For my dessert flavors, I'll vape it at 30 watts, because I want the warmer vape. It's not a cloud chasing set up, but it blows out decent vapor. I prefer the 26 gauge wire because it gives me the surface area on my coil to heat up enough juice (enough wraps), while still able to heat the juice up instantly (not so many wraps, who wants to have to wait for a coil to heat up!).